/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.server.worker.metrics;

import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;

import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.DistributionSummary;
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.Metrics;
import io.micrometer.core.instrument.Timer;
import lombok.experimental.UtilityClass;

@UtilityClass
public class WorkerServerMetrics {

  private final Counter workerOverloadCounter =
      Counter.builder("ds.worker.overload.count")
          .description("overloaded workers count")
          .register(Metrics.globalRegistry);

  private final Counter workerFullSubmitQueueCounter =
      Counter.builder("ds.worker.full.submit.queue.count")
          .description("full worker submit queues count")
          .register(Metrics.globalRegistry);

  private final Counter workerResourceDownloadSuccessCounter =
      Counter.builder("ds.worker.resource.download.count")
          .tag("status", "success")
          .description("worker resource download success count")
          .register(Metrics.globalRegistry);

  private final Counter workerResourceDownloadFailCounter =
      Counter.builder("ds.worker.resource.download.count")
          .tag("status", "fail")
          .description("worker resource download failure count")
          .register(Metrics.globalRegistry);

  private final Timer workerResourceDownloadDurationTimer =
      Timer.builder("ds.worker.resource.download.duration")
          .publishPercentiles(0.5, 0.75, 0.95, 0.99)
          .publishPercentileHistogram()
          .description("time cost of resource download on workers")
          .register(Metrics.globalRegistry);

  private final DistributionSummary workerResourceDownloadSizeDistribution =
      DistributionSummary.builder("ds.worker.resource.download.size")
          .baseUnit("bytes")
          .publishPercentiles(0.5, 0.75, 0.95, 0.99)
          .publishPercentileHistogram()
          .description("size of downloaded resource files on worker")
          .register(Metrics.globalRegistry);

  public void incWorkerOverloadCount() {
    workerOverloadCounter.increment();
  }

  public void incWorkerSubmitQueueIsFullCount() {
    workerFullSubmitQueueCounter.increment();
  }

  public void incWorkerResourceDownloadSuccessCount() {
    workerResourceDownloadSuccessCounter.increment();
  }

  public void incWorkerResourceDownloadFailureCount() {
    workerResourceDownloadFailCounter.increment();
  }

  public void recordWorkerResourceDownloadTime(final long milliseconds) {
    workerResourceDownloadDurationTimer.record(milliseconds, TimeUnit.MILLISECONDS);
  }

  public void recordWorkerResourceDownloadSize(final long size) {
    workerResourceDownloadSizeDistribution.record(size);
  }

  public void registerWorkerRunningTaskGauge(final Supplier<Number> supplier) {
    Gauge.builder("ds.task.running", supplier)
        .description("number of running tasks on workers")
        .register(Metrics.globalRegistry);
  }

}
